Chevrolet 1991 Light Duty Truck Repair Manual page 184

4B5-22 DANA REAR AXLES
Figure 66— Scooter Gage on the Height Block
7. Slide the gage over the arbor (figure 67).
8. Record the reading at the point of greatest deflec­
tion (when the dial indicator needle is centered
between movement to the left and to the right).
• This reading indicates the amount of shims
needed for a nominal pinion setting. The pinion
marking may change the pinion depth by
adding or deleting shims from the nominal pin­
ion setting.
• A positive (+) pinion marking indicates that the
distance between the ring gear centerline and the
pinion head must increase by the number of thou­
sandths marked on the pinion. This means that the
shim pack will decrease by the same number of
thousandths.
• A negative (-) pinion marking indicates that the
distance between the ring gear centerline and the
pinion head must decrease by the number of thou­
sandths marked on the pinion. This means that the
shim pack will increase by the same number of
thousandths.
• A pinion etched zero (0) will use the nominal set­
ting as determined in this procedure.
9. Measure each shim separately with a micrometer
and add them together to obtain the total shim
pack thickness. If a baffle (5) or slinger is used,
these must also be measured and included in the
shim pack (figure 68).
PINION INSTALLATION
|"K "| Install or Connect
Tools Required:
J 7818 Front Pinion Bearing Cup Installer
J 5590 Rear Pinion Bearing Cone Installer
C-4204 Cup Installer
C-4171 Handle
J 8092 Handle
J 8614-01 Pinion Flange Remover
D-116-1 Pinion Height Block
D-116-2 Arbor Discs
D-115-3 Arbor
D-115-2 Scooter Gage Block
Figure 67—Scooter Gage on the A rbor